Balalaika
The think they played balalaikas in the movie.
The triangular one is called a Balalaika. There are several rounded ones by different names.
It is a traditional instrument that is called a shamisenor samisen
Strings
It has strings.
It is called the koto.
A set-square.
pizzicato and when you play with a bow that's called arco
Playing a stringed instrument by plucking the strings is called 'pizzicato'.
String instruments are called that because they have ... strings.
In a stringed musical instrument, the part that vibrates in resonance with the sound waves produced by the strings is called the soundboard or the resonating body. This part amplifies and projects the sound created by the vibrating strings to produce audible music.
The national instrument of China is called the Guzheng. This instrument has three sound holes, 21 musical strings, and is played by hand.